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\name{woodmod.dat}
\alias{woodmod.dat}
\title{
Modified Wood Data
}
\description{
The explanatory variables from the Modified Data on Wood Specific
Gravity analyzed in Rousseeuw and Leroy (1987).
Note that \code{data(wood, package="robustbase")} contains the same
data, and additionally the y-variable.
}
\usage{
data(woodmod.dat)
}
\format{
This data frame contains the following variables:
\describe{
\item{V1}{number of fibers per square milimeter in Springwood (coded by dividing by 1000).}
\item{V2}{number of fibers per square milimeter in Summerwood (coded by dividing by 10000).}
\item{V3}{fraction of Springwood.}
\item{V4}{fraction of light absorption by Springwood.}
\item{V5}{fraction of light absorption by Summerwood.}
}
}
\source{
Rousseeuw, P. J., and Leroy, A. M. (1987). \emph{Robust Regression and Outlier Detection}. New York: Wiley.
}
\examples{
data(woodmod.dat)
woodmod.dat
data(wood, package = "robustbase")
stopifnot(data.matrix(woodmod.dat) ==
data.matrix(wood [,1:5]))
}
\keyword{datasets}
|
